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1 | /* |
2 | * This file is part of DisOrder. | |
3 | * Copyright (C) 2009 Richard Kettlewell | |
4 | * | |
5 | * This program is free software: you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation, either version 3 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | /** @file lib/resample.h | |
20 | * @brief Audio resampling | |
21 | */ | |
22 | ||
23 | #ifndef RESAMPLE_H | |
24 | #define RESAMPLE_H | |
25 | ||
26 | #if HAVE_SAMPLERATE_H | |
27 | #include <samplerate.h> | |
28 | #endif | |
29 | ||
929f577e | 30 | #include "byte-order.h" |
0e8c21de | 31 | |
2c6ee627 | 32 | /** @brief An audio resampler */ |
0e8c21de | 33 | struct resampler { |
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34 | /** @brief Bits/sample in input */ |
35 | int input_bits; | |
36 | ||
37 | /** @brief Number of input channels */ | |
38 | int input_channels; | |
39 | ||
40 | /** @brief Frames/second in input */ | |
41 | int input_rate; | |
42 | ||
43 | /** @brief Whether input samples are signed or unsigned */ | |
44 | int input_signed; | |
45 | ||
46 | /** @brief Input endianness (@c ENDIAN_BIG or @c ENDIAN_LITTLE) */ | |
47 | int input_endian; | |
48 | ||
49 | /** @brief Bits/sample in output */ | |
50 | int output_bits; | |
51 | ||
52 | /** @brief Number of output channels */ | |
53 | int output_channels; | |
54 | ||
55 | /** @brief Frames/second in output */ | |
56 | int output_rate; | |
57 | ||
58 | /** @brief Whether output samples are signed or unsigned */ | |
59 | int output_signed; | |
60 | ||
61 | /** @brief Output endianness (@c ENDIAN_BIG or @c ENDIAN_LITTLE) */ | |
62 | int output_endian; | |
63 | ||
64 | /** @brief */ | |
0e8c21de | 65 | int input_bytes_per_sample; |
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66 | |
67 | /** @brief */ | |
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68 | int input_bytes_per_frame; |
69 | #if HAVE_SAMPLERATE_H | |
2c6ee627 | 70 | /** @brief Libsamplerate handle */ |
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71 | SRC_STATE *state; |
72 | #endif | |
73 | }; | |
74 | ||
75 | void resample_init(struct resampler *rs, | |
76 | int input_bits, int input_channels, | |
77 | int input_rate, int input_signed, | |
78 | int input_endian, | |
79 | int output_bits, int output_channels, | |
80 | int output_rate, int output_signed, | |
81 | int output_endian); | |
0024bde0 | 82 | size_t resample_convert(const struct resampler *rs, |
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83 | const uint8_t *bytes, |
84 | size_t nbytes, | |
85 | int eof, | |
86 | void (*converted)(uint8_t *bytes, | |
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87 | size_t nbytes, |
88 | void *cd), | |
89 | void *cd); | |
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90 | void resample_close(struct resampler *rs); |
91 | ||
92 | #endif /* RESAMPLE_H */ | |
93 | ||
94 | /* | |
95 | Local Variables: | |
96 | c-basic-offset:2 | |
97 | comment-column:40 | |
98 | fill-column:79 | |
99 | indent-tabs-mode:nil | |
100 | End: | |
101 | */ |